Currently typing this out on a brand new phone while trying to work through my thoughts/feelings on the subject, apologies for any mistakes or my stunted ideas! 
I completely understand that in certain situations, politeness and common decency are demanded. We're all a little two-faced, I think. We've all made polite conversation with a co-worker we secretly hate or have told a tactful, white lie.
The sort of two-facedness I'm talking about is the kind that compels people to spend a lot of time with a person, be best friends with them while having nothing but negative, nasty things about them. It just doesn't make sense to me and I've been seeing it more and more lately.
I should mention I'm 21 and currently at college, I actually skipped the "last night out" because I couldn't be bothered spending a night with a group of people who all hate one another (or seem to, from what they've all said about one another) yet insist on getting drunk together. Please tell me it gets better the older you get?